Collision broadening of spectral lines in the X3Σg--->b1Σg+ system of O2

Physics

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Infrared Spectra, Vibration-Rotation Analysis, General Theories And Models Of Atomic And Molecular Collisions And Interactions

Scientific paper

Spectral line broadening in the (v'',v')=(0,0) vibrational band of the O2X-->b system is studied by Fourier transform spectroscopy. Pressure broadening coefficients are determined by fitting a Voigt function to the measured line profiles for each resolvable rotational transition. Pressure broadening coefficients vs. rotational quantum number are reported for Ne and Xe, and O2. The pressure broadening coefficients for self-broadening as a function of rotational state agree well with previous grating spectrometer and diode laser measurements. Preliminary results are also discussed for O2 broadening by He, Ar, Kr, CO, CO2, and SF6.

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